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Finding the Fourth Proportional to 401.28, 602.06 and 218.44

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Solution

The fourth proportional to 401.28, 602.06 and 218.44 is: 327.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.28 : 602.06 = 218.44 : x
  2. Step 2: Convert to fraction form
    401.28/602.06 = 218.44/x
  3. Step 3: Cross multiply
    401.28x = 602.06 × 218.44
  4. Step 4: Simplify right side
    401.28x = 131,513.99
  5. Step 5: Solve for x
    x = 131,513.99/401.28
  6. Step 6: Final answer
    x = 327.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.